Guido,
The field type solr.SpatialRecursivePrefixTreeFieldType can only
participate in distance reporting for indexed points, not other shapes.
In fact, I recommend not attempting to get the distance if the field isn't
purely indexed points, as it may get confused if it seems some small
shapes. For your use-case, you should index an additional
solr.SpatialRecursivePrefixTreeFieldType field just for the points. You
could do this external to Solr, or you could write a Solr
UpdateRequestProcessor that parses the shape in order to then call
getCenter(), and put those points in the other field.
~ David
On 4/16/13 7:23 AM, "Guido Medina" <guido.med...@temetra.com> wrote:
>Hi,
>
>I got everything in place, my polygons are indexing properly, I played a
>bit with LSP which helped me a lot, now, I have JTS 1.13 inside
>solr.war; here is my challenge:
>
>I have big polygon (A) which contains smaller polygons (B and C), B and
>C have some intersection, so if I search for a coordinate inside the 3,
>I would like to sort by the distance to the centre of the polygons that
>match the criteria.
>
>As example, let's say dot B is on the centre of B, dot C is at the
>centre of C and dot A is at the intersection of B and C which happens to
>be the centre of A, so for dot A should be polygon A first and so on. I
>could compute with the distances using the result but since Solr is
>doing a heavy load already, why not just include the sort in it.
>
>Here is my field type definition:
>
> <!-- Spatial field type -->
> <fieldType name="location_rpt"
>class="solr.SpatialRecursivePrefixTreeFieldType"
>spatialContextFactory="com.spatial4j.core.context.jts.JtsSpatialContextFac
>tory"
> units="degrees"/>
>
>
>Field definition:
>
> <!-- JTS spatial polygon field -->
> <field name="geopolygon" type="location_rpt" indexed="true"
>stored="false" required="false" multiValued="true"/>
>
>
>I'm using the Solr admin UI first to shape my query and then moving to
>our web app which uses solrj, here is the XML form of my result which
>includes the query I'm making, which scores all distances to 1.0 (Not
>what I want):
>
>|<?xml version="1.0" encoding="UTF-8"?>
><response>
>
><lst name="responseHeader">
> <int name="status">0</int>
> <int name="QTime">9</int>
> <lst name="params">
> <str name="fl">id,score</str>
> <str name="sort">score asc</str>
> <str name="indent">true</str>
> <str name="q">*:*</str>
> <str name="_">1366111120720</str>
> <str name="wt">xml</str>
> <str name="fq">{!score=distance}geopolygon:"Intersects(-6.271906
>53.379284)"</str>
> </lst>
></lst>
><result name="response" numFound="3" start="0" maxScore="1.0">
> <doc>
> <str name="id">uid13972</str>
> <float name="score">1.0</float></doc>
> <doc>
> <str name="id">uid13979</str>
> <float name="score">1.0</float></doc>
> <doc>
> <str name="id">uid13974</str>
> <float name="score">1.0</float></doc>
></result>
></response>|
>
>
>Thanks for all responses,
>
>Guido.
